Once the pair collide in 10,000 years, the ripple effects will be visible across the universe.
are distant objects powered by black holes a billion times as massive as our sun. Astronomers are interested in these super-bright objects in part because quasars may give insight into the physics of the early universe.If the findings from this study are confirmed, PKS 2131-021 is not alone in having a pair of supermassive black holes merging. The first suggested pair in quasar OJ 287, however, are much further apart and take nine years to circle each other.
Researchers in this study used 45 years of observations from multiple radio observatories to catch a powerful jet in action within PKS 2131-021, which appears to be moving back and forth as the pair of black holes orbit each other. The movement in turn causes changes in the brightness of radio waves observed at Earth.
"When we realized that the peaks and troughs of the light curve detected from recent times matched the peaks and troughs observed between 1975 and 1983, we knew something very special was going on," Sandra O'Neill, lead author of the new study and an undergraduate astronomy student at Caltech, said in the same statement. Galaxies commonly have huge black holes in their centers, including our own Milky Way.
The effects of such mergers create huge ripples across space and time, known as gravitational waves. Gravitational waves have been observed multiple times using the National Science Foundation'sThat said, the supermassive black holes would not be visible to LIGO, as the black holes produce lower frequencies of gravitational waves that are undetectable in LIGO's sensors.
, according to the statement. In the meantime, light waves can show supermassive black holes in action.Follow Elizabeth Howell on Twitter
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